<template>
  <div :class="{'hidden':hidden}" class="pagination-container">
    <!-- <el-pagination
      :background="background"
      :current-page.sync="currentPage"
      :page-size.sync="pageSize"
      :layout="layout"
      :page-sizes="pageSizes"
      :pager-count="pagerCount"
      :total="total"
      v-bind="$attrs"
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
    /> -->

    <el-pagination
      :background="background"
      :current-page.sync="currentPage"
      :page-size.sync="pageSize"
      :layout="layout"
      :page-sizes="pageSizes"
      :pager-count="pagerCount"
      :total="total"
      v-bind="$attrs"
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
    />
    <div class="miniBox">
      请输入显示条数:
      <el-input v-model.number="pageSize"
        style="margin-top: 8px;width: 100px;"
        placeholder="条数"
        @change="pageInputChange"
        @input="changeInputValue">
      </el-input>
    </div>
    
  </div>
</template>

<script>
import { scrollTo } from '@/utils/scroll-to'

export default {
  name: 'Pagination',
  props: {
    total: {
      required: true,
      type: Number
    },
    page: {
      type: Number,
      default: 1
    },
    limit: {
      type: Number,
      default: 20
    },
    /* pageSize:{
      type:Array,
      default(){[10,30,50,100]}
    }, */
    pageSizes: 10,
    // 移动端页码按钮的数量端默认值5
    pagerCount: {
      type: Number,
      default: document.body.clientWidth < 992 ? 5 : 7
    },
    layout: {
      type: String,
      default: 'total, prev, pager, next, jumper'
    },
    background: {
      type: Boolean,
      default: true
    },
    autoScroll: {
      type: Boolean,
      default: true
    },
    hidden: {
      type: Boolean,
      default: false
    }
  },
  data() {
    return {
    };
  },
  mounted(){
    if (localStorage.getItem("pagesChangeWs")) {
      this.pageSize = Number(localStorage.getItem("pagesChangeWs"))
    } else {
      this.pageSize = 10
    }
    pageInputChange(this.pageSize)
  },
  computed: {
    currentPage: {
      get() {
        return this.page
      },
      set(val) {
        this.$emit('update:page', val)
      }
    },
    pageSize: {
      get() {
        return this.limit
      },
      set(val) {
        this.$emit('update:limit', val)
      }
    }
  },
  methods: {
    handleSizeChange(val) {
      if (this.currentPage * val > this.total) {
        this.currentPage = 1
      }
      this.$emit('pagination', { page: this.currentPage, limit: val })
      if (this.autoScroll) {
        scrollTo(0, 800)
      }
    },
    handleCurrentChange(val) {
      this.$emit('pagination', { page: val, limit: this.pageSize })
      if (this.autoScroll) {
        scrollTo(0, 800)
      }
    },
    //当改变PageSize大小的时候
    pageInputChange(val){
      let pageList = []
      pageList.push(val)
      localStorage.setItem("pagesChangeWs",pageList)
      this.handleSizeChange(val)
    },
    //当输入框发生数值的变化的时候
    changeInputValue(val){
      if(!val) {
        this.$message.error('每页显示的条数不能为空,最低为1!')
        this.pageSize = 1
      }
    }
  }
}
</script>

<style scoped>
.pagination-container {
  background: #fff;
  padding: 32px 16px;
}
.pagination-container.hidden {
  display: none;
}
.miniBox{
  font-size: 12px;
  color: rgb(95, 84, 84);
  margin-top: -10px;
}
</style>
